iris
focusing lens of the eye....
A camera eye is an eye with a crystalline lens that focuses light. It is found in squid, octopi, and vertebrates. This is similar to the lens arrangement of a camera.
The focusing lens of the camera
The part of the eye that is similar to a contact lens is the crystalline lens.
the lens
This part is called a Lens, on the camera and the glasses the are made of either optical glass or optical plastic, in the eye the lens in an organic material. Lens allow light to enter the camera, eye or glasses, and focuses that light on a surface such as the camera's film, the eye's retina, and the glasses wearer's eyes.
a lens
The retina is very similar to the film in a camera. Images come through the eye's lens and are focused on the retina. The retina then converts these images to electric signals and sends them by way of the optic nerve to the back lobe of the brain.
The retina is very similar to the film in a camera. Images come through the eye's lens and are focused on the retina. The retina then converts these images to electric signals and sends them by way of the optic nerve to the back lobe of the brain.
The lens. However, the human lens is flexible. Focusing is accomplished by tensing or relaxing the muscles surrounding the lens, changing its shape and therefore the focus. Camera lenses are inflexible, so focusing is accomplished by moving the lens closer or further from the film plane.The light rays first pass through the clear front part of the eye called the CORNEA. The light then passes through the PUPIL, which is an opening created by the IRIS or colored part of the eye. Next, the light passes through the LENS and finally arrives at the RETINA.So the part of the eye most oike the lens of a camera is the LENS. It's not the IRIS; that controls the size of the opening that the light comes though.
The retina is very similar to the film in a camera. Images come through the eye's lens and are focused on the retina. The retina then converts these images to electric signals and sends them by way of the optic nerve to the back lobe of the brain.
In a camera the following parts could be considered equivalent to the parts of a human eye:Optical diaphragm = IrisAperture in optical diaphragm = PupilOuter lens element / lens glass = CorneaInner lens element = Eye lensCCD Sensor (in a digital camera) = RetinaThis is a huge simplification of a very complex topic. Please see the related links for more information.